decryptverifytask.cpp
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decryptverifytask.cpp
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	/* -- mode: c++; c-basic-offset:4 --
	decryptverifytask.cpp

	This file is part of Kleopatra, the KDE keymanager
	SPDX-FileCopyrightText: 2008 Klarälvdalens Datakonsult AB

	SPDX-License-Identifier: GPL-2.0-or-later
	*/

	#include <config-kleopatra.h>

	#include "decryptverifytask.h"

	#include <QGpgME/DecryptJob>
	#include <QGpgME/DecryptVerifyArchiveJob>
	#include <QGpgME/DecryptVerifyJob>
	#include <QGpgME/Protocol>
	#include <QGpgME/VerifyDetachedJob>
	#include <QGpgME/VerifyOpaqueJob>

	#include <Libkleo/AuditLogEntry>
	#include <Libkleo/Classify>
	#include <Libkleo/Compliance>
	#include <Libkleo/Dn>
	#include <Libkleo/Formatting>
	#include <Libkleo/KeyCache>
	#include <Libkleo/KleoException>
	#include <Libkleo/Predicates>
	#include <Libkleo/Stl_Util>

	#include <Libkleo/GnuPG>
	#include <utils/detail_p.h>
	#include <utils/input.h>
	#include <utils/kleo_assert.h>
	#include <utils/output.h>

	#include <KMime/HeaderParsing>

	#include <gpgme++/context.h>
	#include <gpgme++/decryptionresult.h>
	#include <gpgme++/error.h>
	#include <gpgme++/key.h>
	#include <gpgme++/verificationresult.h>

	#include <gpg-error.h>

	#include "kleopatra_debug.h"

	#include <KFileUtils>
	#include <KLocalizedString>

	#include <QByteArray>
	#include <QDateTime>
	#include <QDir>
	#include <QFile>
	#include <QFileInfo>
	#include <QIODevice>
	#include <QLocale>
	#include <QMimeDatabase>
	#include <QStringList>
	#include <QTextDocument> // Qt::escape

	#include <algorithm>
	#include <sstream>

	using namespace Kleo::Crypto;
	using namespace Kleo;
	using namespace GpgME;
	using namespace KMime::Types;

	namespace
	{

	static AuditLogEntry auditLogFromSender(QObject *sender)
	{
	return AuditLogEntry::fromJob(qobject_cast<const QGpgME::Job *>(sender));
	}

	static bool addrspec_equal(const AddrSpec &lhs, const AddrSpec &rhs, Qt::CaseSensitivity cs)
	{
	return lhs.localPart.compare(rhs.localPart, cs) == 0 && lhs.domain.compare(rhs.domain, Qt::CaseInsensitive) == 0;
	}

	static bool mailbox_equal(const Mailbox &lhs, const Mailbox &rhs, Qt::CaseSensitivity cs)
	{
	return addrspec_equal(lhs.addrSpec(), rhs.addrSpec(), cs);
	}

	static std::string stripAngleBrackets(const std::string &str)
	{
	if (str.empty()) {
	return str;
	}
	if (str[0] == '<' && str[str.size() - 1] == '>') {
	return str.substr(1, str.size() - 2);
	}
	return str;
	}

	static std::string email(const UserID &uid)
	{
	if (uid.parent().protocol() == OpenPGP) {
	if (const char *const email = uid.email()) {
	return stripAngleBrackets(email);
	} else {
	return std::string();
	}
	}

	Q_ASSERT(uid.parent().protocol() == CMS);

	if (const char *const id = uid.id())
	if (*id == '<') {
	return stripAngleBrackets(id);
	} else {
	return DN(id)[QStringLiteral("EMAIL")].trimmed().toUtf8().constData();
	}
	else {
	return std::string();
	}
	}

	static Mailbox mailbox(const UserID &uid)
	{
	const std::string e = email(uid);
	Mailbox mbox;
	if (!e.empty()) {
	mbox.setAddress(e.c_str());
	}
	return mbox;
	}

	static std::vector<Mailbox> extractMailboxes(const Key &key)
	{
	std::vector<Mailbox> res;
	const auto userIDs{key.userIDs()};
	for (const UserID &id : userIDs) {
	const Mailbox mbox = mailbox(id);
	if (!mbox.addrSpec().isEmpty()) {
	res.push_back(mbox);
	}
	}
	return res;
	}

	static std::vector<Mailbox> extractMailboxes(const std::vector<Key> &signers)
	{
	std::vector<Mailbox> res;
	for (const Key &i : signers) {
	const std::vector<Mailbox> bxs = extractMailboxes(i);
	res.insert(res.end(), bxs.begin(), bxs.end());
	}
	return res;
	}

	static bool keyContainsMailbox(const Key &key, const Mailbox &mbox)
	{
	const std::vector<Mailbox> mbxs = extractMailboxes(key);
	return std::find_if(mbxs.cbegin(),
	mbxs.cend(),
	[mbox](const Mailbox &m) {
	return mailbox_equal(mbox, m, Qt::CaseInsensitive);
	})
	!= mbxs.cend();
	}

	static bool keysContainMailbox(const std::vector<Key> &keys, const Mailbox &mbox)
	{
	return std::find_if(keys.cbegin(),
	keys.cend(),
	[mbox](const Key &key) {
	return keyContainsMailbox(key, mbox);
	})
	!= keys.cend();
	}

	static bool relevantInDecryptVerifyContext(const VerificationResult &r)
	{
	// for D/V operations, we ignore verification results which are not errors and contain
	// no signatures (which means that the data was just not signed)

	return (r.error() && r.error().code() != GPG_ERR_DECRYPT_FAILED) \|\| r.numSignatures() > 0;
	}

	static QString signatureSummaryToString(int summary)
	{
	if (summary & Signature::None) {
	return i18n("Error: Signature not verified");
	} else if (summary & Signature::Valid \|\| summary & Signature::Green) {
	return i18n("Good signature");
	} else if (summary & Signature::KeyRevoked) {
	return i18n("Signing certificate was revoked");
	} else if (summary & Signature::KeyExpired) {
	return i18n("Signing certificate is expired");
	} else if (summary & Signature::KeyMissing) {
	return i18n("Certificate is not available");
	} else if (summary & Signature::SigExpired) {
	return i18n("Signature expired");
	} else if (summary & Signature::CrlMissing) {
	return i18n("CRL missing");
	} else if (summary & Signature::CrlTooOld) {
	return i18n("CRL too old");
	} else if (summary & Signature::BadPolicy) {
	return i18n("Bad policy");
	} else if (summary & Signature::SysError) {
	return i18n("System error"); // ### retrieve system error details?
	} else if (summary & Signature::Red) {
	return i18n("Bad signature");
	}
	return QString();
	}

	static QString formatValidSignatureWithTrustLevel(const UserID &id)
	{
	if (id.isNull()) {
	return QString();
	}
	switch (id.validity()) {
	case UserID::Marginal:
	return i18n("The signature is valid but the trust in the certificate's validity is only marginal.");
	case UserID::Full:
	return i18n("The signature is valid and the certificate's validity is fully trusted.");
	case UserID::Ultimate:
	return i18n("The signature is valid and the certificate's validity is ultimately trusted.");
	case UserID::Never:
	return i18n("The signature is valid but the certificate's validity is <em>not trusted</em>.");
	case UserID::Unknown:
	return i18n("The signature is valid but the certificate's validity is unknown.");
	case UserID::Undefined:
	default:
	return i18n("The signature is valid but the certificate's validity is undefined.");
	}
	}

	static QString renderKeyLink(const QString &fpr, const QString &text)
	{
	return QStringLiteral("<a href=\"key:%1\">%2</a>").arg(fpr, text);
	}

	static QString renderKey(const Key &key)
	{
	if (key.isNull()) {
	return i18n("Unknown certificate");
	}

	if (key.primaryFingerprint() && strlen(key.primaryFingerprint()) > 16 && key.numUserIDs()) {
	const QString text = QStringLiteral("%1 (%2)")
	.arg(Formatting::prettyNameAndEMail(key).toHtmlEscaped())
	.arg(Formatting::prettyID(QString::fromLocal8Bit(key.primaryFingerprint()).right(16).toLatin1().constData()));
	return renderKeyLink(QLatin1String(key.primaryFingerprint()), text);
	}

	return renderKeyLink(QLatin1String(key.primaryFingerprint()), Formatting::prettyID(key.primaryFingerprint()));
	}

	static QString renderKeyEMailOnlyNameAsFallback(const Key &key)
	{
	if (key.isNull()) {
	return i18n("Unknown certificate");
	}
	const QString email = Formatting::prettyEMail(key);
	const QString user = !email.isEmpty() ? email : Formatting::prettyName(key);
	return renderKeyLink(QLatin1String(key.primaryFingerprint()), user);
	}

	static QString formatDate(const QDateTime &dt)
	{
	return QLocale().toString(dt);
	}
	static QString formatSigningInformation(const Signature &sig)
	{
	if (sig.isNull()) {
	return QString();
	}
	const QDateTime dt = sig.creationTime() != 0 ? QDateTime::fromSecsSinceEpoch(quint32(sig.creationTime())) : QDateTime();
	QString text;
	Key key = sig.key();
	if (dt.isValid()) {
	text = i18nc("1 is a date", "Signature created on %1", formatDate(dt)) + QStringLiteral("<br>");
	}
	if (key.isNull()) {
	return text += i18n("With unavailable certificate:") + QStringLiteral("<br>ID: 0x%1").arg(QString::fromLatin1(sig.fingerprint()).toUpper());
	}
	text += i18n("With certificate:") + QStringLiteral("<br>") + renderKey(key);

	if (DeVSCompliance::isCompliant()) {
	text += (QStringLiteral("<br/>")
	+ (sig.isDeVs() ? i18nc("%1 is a placeholder for the name of a compliance mode. E.g. NATO RESTRICTED compliant or VS-NfD compliant",
	"The signature is %1",
	DeVSCompliance::name(true))
	: i18nc("%1 is a placeholder for the name of a compliance mode. E.g. NATO RESTRICTED compliant or VS-NfD compliant",
	"The signature <b>is not</b> %1.",
	DeVSCompliance::name(true))));
	}

	return text;
	}

	static QString strikeOut(const QString &str, bool strike)
	{
	return QString(strike ? QStringLiteral("<s>%1</s>") : QStringLiteral("%1")).arg(str.toHtmlEscaped());
	}

	static QString formatInputOutputLabel(const QString &input, const QString &output, bool inputDeleted, bool outputDeleted)
	{
	if (output.isEmpty()) {
	return strikeOut(input, inputDeleted);
	}
	return i18nc("Input file --> Output file (rarr is arrow", "%1 → %2", strikeOut(input, inputDeleted), strikeOut(output, outputDeleted));
	}

	static bool IsErrorOrCanceled(const GpgME::Error &err)
	{
	return err \|\| err.isCanceled();
	}

	static bool IsErrorOrCanceled(const Result &res)
	{
	return IsErrorOrCanceled(res.error());
	}

	static bool IsBad(const Signature &sig)
	{
	return sig.summary() & Signature::Red;
	}

	static bool IsGoodOrValid(const Signature &sig)
	{
	return (sig.summary() & Signature::Valid) \|\| (sig.summary() & Signature::Green);
	}

	static UserID findUserIDByMailbox(const Key &key, const Mailbox &mbox)
	{
	const auto userIDs{key.userIDs()};
	for (const UserID &id : userIDs)
	if (mailbox_equal(mailbox(id), mbox, Qt::CaseInsensitive)) {
	return id;
	}
	return UserID();
	}

	static void updateKeys(const VerificationResult &result)
	{
	// This little hack works around the problem that GnuPG / GpgME does not
	// provide Key information in a verification result. The Key object is
	// a dummy just holding the KeyID. This hack ensures that all available
	// keys are fetched from the backend and are populated
	for (const auto &sig : result.signatures()) {
	// Update key information
	sig.key(true, true);
	}
	}

	static QString ensureUniqueDirectory(const QString &path)
	{
	// make sure that we don't use an existing directory
	QString uniquePath = path;
	const QFileInfo outputInfo{path};
	if (outputInfo.exists()) {
	const auto uniqueName = KFileUtils::suggestName(QUrl::fromLocalFile(outputInfo.absolutePath()), outputInfo.fileName());
	uniquePath = outputInfo.dir().filePath(uniqueName);
	}
	if (!QDir{}.mkpath(uniquePath)) {
	return {};
	}
	return uniquePath;
	}

	static bool mimeTypeInherits(const QMimeType &mimeType, const QString &mimeTypeName)
	{
	// inherits is expensive on an invalid mimeType
	return mimeType.isValid() && mimeType.inherits(mimeTypeName);
	}

	}

	class DecryptVerifyResult::SenderInfo
	{
	public:
	explicit SenderInfo(const Mailbox &infSender, const std::vector<Key> &signers_)
	: informativeSender(infSender)
	, signers(signers_)
	{
	}
	const Mailbox informativeSender;
	const std::vector<Key> signers;
	bool hasInformativeSender() const
	{
	return !informativeSender.addrSpec().isEmpty();
	}
	bool conflicts() const
	{
	return hasInformativeSender() && hasKeys() && !keysContainMailbox(signers, informativeSender);
	}
	bool hasKeys() const
	{
	return std::any_of(signers.cbegin(), signers.cend(), [](const Key &key) {
	return !key.isNull();
	});
	}
	std::vector<Mailbox> signerMailboxes() const
	{
	return extractMailboxes(signers);
	}
	};

	namespace
	{

	static Task::Result::VisualCode codeForVerificationResult(const VerificationResult &res)
	{
	if (res.isNull()) {
	return Task::Result::NeutralSuccess;
	}

	const std::vector<Signature> sigs = res.signatures();
	if (sigs.empty()) {
	return Task::Result::Warning;
	}

	if (std::find_if(sigs.begin(), sigs.end(), IsBad) != sigs.end()) {
	return Task::Result::Danger;
	}

	if ((size_t)std::count_if(sigs.begin(), sigs.end(), IsGoodOrValid) == sigs.size()) {
	return Task::Result::AllGood;
	}

	return Task::Result::Warning;
	}

	static QString formatVerificationResultOverview(const VerificationResult &res, const DecryptVerifyResult::SenderInfo &info)
	{
	if (res.isNull()) {
	return QString();
	}

	const Error err = res.error();

	if (err.isCanceled()) {
	return i18n("<b>Verification canceled.</b>");
	} else if (err) {
	return i18n("<b>Verification failed: %1.</b>", Formatting::errorAsString(err).toHtmlEscaped());
	}

	const std::vector<Signature> sigs = res.signatures();

	if (sigs.empty()) {
	return i18n("<b>No signatures found.</b>");
	}

	const uint bad = std::count_if(sigs.cbegin(), sigs.cend(), IsBad);
	if (bad > 0) {
	return i18np("<b>Invalid signature.</b>", "<b>%1 invalid signatures.</b>", bad);
	}
	const uint warn = std::count_if(sigs.cbegin(), sigs.cend(), [](const Signature &sig) {
	return !IsGoodOrValid(sig);
	});
	if (warn == sigs.size()) {
	return i18np("<b>The data could not be verified.</b>", "<b>%1 signatures could not be verified.</b>", warn);
	}

	// Good signature:
	QString text;
	if (sigs.size() == 1) {
	text = i18n("<b>Valid signature by %1</b>", renderKeyEMailOnlyNameAsFallback(sigs[0].key()));
	if (info.conflicts())
	text += i18n("<br/><b>Warning:</b> The sender's mail address is not stored in the %1 used for signing.",
	renderKeyLink(QLatin1String(sigs[0].key().primaryFingerprint()), i18n("certificate")));
	} else {
	text = i18np("<b>Valid signature.</b>", "<b>%1 valid signatures.</b>", sigs.size());
	if (info.conflicts()) {
	text += i18n("<br/><b>Warning:</b> The sender's mail address is not stored in the certificates used for signing.");
	}
	}

	return text;
	}

	static QString formatDecryptionResultOverview(const DecryptionResult &result, const QString &errorString = QString())
	{
	const Error err = result.error();

	if (err.isCanceled()) {
	return i18n("<b>Decryption canceled.</b>");
	} else if (result.error().code() == GPG_ERR_NO_SECKEY) {
	return i18nc("@info",
	"<b>Decryption not possible: %1</b><br />The data was not encrypted for any secret key in your certificate list.",
	Formatting::errorAsString(err));
	} else if (result.isLegacyCipherNoMDC()) {
	return i18n("<b>Decryption failed: %1.</b>", i18n("No integrity protection (MDC)."));
	} else if (!errorString.isEmpty()) {
	return i18n("<b>Decryption failed: %1.</b>", errorString.toHtmlEscaped());
	} else if (err) {
	return i18n("<b>Decryption failed: %1.</b>", Formatting::errorAsString(err));
	}
	return i18n("<b>Decryption succeeded.</b>");
	}

	static QString formatSignature(const Signature &sig, const DecryptVerifyResult::SenderInfo &info)
	{
	if (sig.isNull()) {
	return QString();
	}

	const QString text = formatSigningInformation(sig) + QLatin1String("<br/>");
	const Key key = sig.key();

	// Green
	if (sig.summary() & Signature::Valid) {
	const UserID id = findUserIDByMailbox(key, info.informativeSender);
	return text + formatValidSignatureWithTrustLevel(!id.isNull() ? id : key.userID(0));
	}

	// Red
	if ((sig.summary() & Signature::Red)) {
	const QString ret = text + i18n("The signature is invalid: %1", signatureSummaryToString(sig.summary()));
	if (sig.summary() & Signature::SysError) {
	return ret + QStringLiteral(" (%1)").arg(Formatting::errorAsString(sig.status()));
	}
	return ret;
	}

	// Key missing
	if ((sig.summary() & Signature::KeyMissing)) {
	return text + i18n("You can search the certificate on a keyserver or import it from a file.");
	}

	// Yellow
	if ((sig.validity() & Signature::Validity::Undefined) //
	\|\| (sig.validity() & Signature::Validity::Unknown) //
	\|\| (sig.summary() == Signature::Summary::None)) {
	return text
	+ (key.protocol() == OpenPGP
	? i18n("The used key is not certified by you or any trusted person.")
	: i18n("The used certificate is not certified by a trustworthy Certificate Authority or the Certificate Authority is unknown."));
	}

	// Catch all fall through
	const QString ret = text + i18n("The signature is invalid: %1", signatureSummaryToString(sig.summary()));
	if (sig.summary() & Signature::SysError) {
	return ret + QStringLiteral(" (%1)").arg(Formatting::errorAsString(sig.status()));
	}
	return ret;
	}

	static QStringList format(const std::vector<Mailbox> &mbxs)
	{
	QStringList res;
	std::transform(mbxs.cbegin(), mbxs.cend(), std::back_inserter(res), [](const Mailbox &mbox) {
	return mbox.prettyAddress();
	});
	return res;
	}

	static QString formatVerificationResultDetails(const VerificationResult &res, const DecryptVerifyResult::SenderInfo &info, const QString &errorString)
	{
	if ((res.error().code() == GPG_ERR_EIO \|\| res.error().code() == GPG_ERR_NO_DATA) && !errorString.isEmpty()) {
	return i18n("Input error: %1", errorString);
	}

	const std::vector<Signature> sigs = res.signatures();
	QString details;
	for (const Signature &sig : sigs) {
	details += formatSignature(sig, info) + QLatin1Char('\n');
	}
	details = details.trimmed();
	details.replace(QLatin1Char('\n'), QStringLiteral("<br/><br/>"));
	if (info.conflicts()) {
	details += i18n("<p>The sender's address %1 is not stored in the certificate. Stored: %2</p>",
	info.informativeSender.prettyAddress(),
	format(info.signerMailboxes()).join(i18nc("separator for a list of e-mail addresses", ", ")));
	}
	return details;
	}

	static QString formatRecipientsDetails(const std::vector<Key> &knownRecipients, unsigned int numRecipients)
	{
	if (numRecipients == 0) {
	return {};
	}

	QString details = i18np("Recipient:", "Recipients:", numRecipients);

	if (numRecipients == 1) {
	if (knownRecipients.empty()) {
	details += QLatin1Char(' ') + i18nc("@info", "One unknown recipient");
	} else {
	details += QLatin1Char(' ') + Formatting::summaryLine(knownRecipients.front()).toHtmlEscaped();
	}
	} else {
	details += QLatin1String("<ul>");
	for (const Key &key : knownRecipients) {
	details += QLatin1String("<li>") + Formatting::summaryLine(key).toHtmlEscaped() + QLatin1String("</li>");
	}
	if (knownRecipients.size() < numRecipients) {
	details += QLatin1String("<li>") + i18np("One unknown recipient", "%1 unknown recipients", numRecipients - knownRecipients.size())
	+ QLatin1String("</li>");
	}
	details += QLatin1String("</ul>");
	}

	return details;
	}

	static QString formatDecryptionResultDetails(const DecryptionResult &res,
	const std::vector<Key> &recipients,
	const QString &errorString,
	bool isSigned,
	const QPointer<Task> &task)
	{
	if ((res.error().code() == GPG_ERR_EIO \|\| res.error().code() == GPG_ERR_NO_DATA) && !errorString.isEmpty()) {
	return i18n("Input error: %1", errorString);
	}

	if (res.isNull() \|\| res.error() \|\| res.error().isCanceled()) {
	if (res.error().code() == GPG_ERR_NO_SECKEY && recipients.empty()) {
	return {};
	}
	return formatRecipientsDetails(recipients, res.numRecipients());
	}

	QString details;

	if (DeVSCompliance::isCompliant()) {
	details += ((res.isDeVs() ? i18nc("%1 is a placeholder for the name of a compliance mode. E.g. NATO RESTRICTED compliant or VS-NfD compliant",
	"The decryption is %1.",
	DeVSCompliance::name(true))
	: i18nc("%1 is a placeholder for the name of a compliance mode. E.g. NATO RESTRICTED compliant or VS-NfD compliant",
	"The decryption <b>is not</b> %1.",
	DeVSCompliance::name(true)))
	+ QStringLiteral("<br/>"));
	}

	if (res.fileName()) {
	const auto decVerifyTask = qobject_cast<AbstractDecryptVerifyTask *>(task.data());
	if (decVerifyTask) {
	const auto embedFileName = QString::fromUtf8(res.fileName()).toHtmlEscaped();

	if (embedFileName != decVerifyTask->outputLabel()) {
	details += i18n("Embedded file name: '%1'", embedFileName);
	details += QStringLiteral("<br/>");
	}
	}
	}

	if (!isSigned) {
	details += i18n("<b>Note:</b> You cannot be sure who encrypted this message as it is not signed.") + QLatin1String("<br/>");
	}

	if (res.isLegacyCipherNoMDC()) {
	details += i18nc("Integrity protection was missing because an old cipher was used.",
	"<b>Hint:</b> If this file was encrypted before the year 2003 it is "
	"likely that the file is legitimate. This is because back "
	"then integrity protection was not widely used.")
	+ QStringLiteral("<br/><br/>")
	+ i18nc("The user is offered to force decrypt a non integrity protected message. With the strong advice to re-encrypt it.",
	"If you are confident that the file was not manipulated you should re-encrypt it after you have forced the decryption.")
	+ QStringLiteral("<br/><br/>");
	}

	details += formatRecipientsDetails(recipients, res.numRecipients());

	return details;
	}

	static QString formatDecryptVerifyResultOverview(const DecryptionResult &dr, const VerificationResult &vr, const DecryptVerifyResult::SenderInfo &info)
	{
	if (IsErrorOrCanceled(dr) \|\| !relevantInDecryptVerifyContext(vr)) {
	return formatDecryptionResultOverview(dr);
	}
	return formatVerificationResultOverview(vr, info);
	}

	static QString formatDecryptVerifyResultDetails(const DecryptionResult &dr,
	const VerificationResult &vr,
	const std::vector<Key> &recipients,
	const DecryptVerifyResult::SenderInfo &info,
	const QString &errorString,
	const QPointer<Task> &task)
	{
	const QString drDetails = formatDecryptionResultDetails(dr, recipients, errorString, relevantInDecryptVerifyContext(vr), task);
	if (IsErrorOrCanceled(dr) \|\| !relevantInDecryptVerifyContext(vr)) {
	return drDetails;
	}
	return drDetails + (drDetails.isEmpty() ? QString() : QStringLiteral("<br/>")) + formatVerificationResultDetails(vr, info, errorString);
	}

	} // anon namespace

	class DecryptVerifyResult::Private
	{
	DecryptVerifyResult *const q;

	public:
	Private(DecryptVerifyOperation type,
	const VerificationResult &vr,
	const DecryptionResult &dr,
	const QByteArray &stuff,
	const QString &fileName,
	const GpgME::Error &error,
	const QString &errString,
	const QString &input,
	const QString &output,
	const AuditLogEntry &auditLog,
	Task *parentTask,
	const Mailbox &informativeSender,
	DecryptVerifyResult *qq)
	: q(qq)
	, m_type(type)
	, m_verificationResult(vr)
	, m_decryptionResult(dr)
	, m_stuff(stuff)
	, m_fileName(fileName)
	, m_error(error)
	, m_errorString(errString)
	, m_inputLabel(input)
	, m_outputLabel(output)
	, m_auditLog(auditLog)
	, m_parentTask(QPointer<Task>(parentTask))
	, m_informativeSender(informativeSender)
	{
	}

	QString label() const
	{
	return formatInputOutputLabel(m_inputLabel, m_outputLabel, false, q->hasError());
	}

	DecryptVerifyResult::SenderInfo makeSenderInfo() const;

	bool isDecryptOnly() const
	{
	return m_type == Decrypt;
	}
	bool isVerifyOnly() const
	{
	return m_type == Verify;
	}
	bool isDecryptVerify() const
	{
	return m_type == DecryptVerify;
	}
	DecryptVerifyOperation m_type;
	VerificationResult m_verificationResult;
	DecryptionResult m_decryptionResult;
	QByteArray m_stuff;
	QString m_fileName;
	GpgME::Error m_error;
	QString m_errorString;
	QString m_inputLabel;
	QString m_outputLabel;
	const AuditLogEntry m_auditLog;
	QPointer<Task> m_parentTask;
	const Mailbox m_informativeSender;
	};

	DecryptVerifyResult::SenderInfo DecryptVerifyResult::Private::makeSenderInfo() const
	{
	return SenderInfo(m_informativeSender, KeyCache::instance()->findSigners(m_verificationResult));
	}

	std::shared_ptr<DecryptVerifyResult>
	AbstractDecryptVerifyTask::fromDecryptResult(const DecryptionResult &dr, const QByteArray &plaintext, const AuditLogEntry &auditLog)
	{
	return std::shared_ptr<DecryptVerifyResult>(new DecryptVerifyResult(Decrypt, //
	VerificationResult(),
	dr,
	plaintext,
	{},
	{},
	QString(),
	inputLabel(),
	outputLabel(),
	auditLog,
	this,
	informativeSender()));
	}

	std::shared_ptr<DecryptVerifyResult> AbstractDecryptVerifyTask::fromDecryptResult(const GpgME::Error &err, const QString &what, const AuditLogEntry &auditLog)
	{
	return std::shared_ptr<DecryptVerifyResult>(new DecryptVerifyResult(Decrypt, //
	VerificationResult(),
	DecryptionResult(err),
	QByteArray(),
	{},
	err,
	what,
	inputLabel(),
	outputLabel(),
	auditLog,
	this,
	informativeSender()));
	}

	std::shared_ptr<DecryptVerifyResult> AbstractDecryptVerifyTask::fromDecryptVerifyResult(const DecryptionResult &dr,
	const VerificationResult &vr,
	const QByteArray &plaintext,
	const QString &fileName,
	const AuditLogEntry &auditLog)
	{
	const auto err = dr.error().code() ? dr.error() : vr.error();
	return std::shared_ptr<DecryptVerifyResult>(new DecryptVerifyResult(DecryptVerify, //
	vr,
	dr,
	plaintext,
	fileName,
	err,
	QString(),
	inputLabel(),
	outputLabel(),
	auditLog,
	this,
	informativeSender()));
	}

	std::shared_ptr<DecryptVerifyResult>
	AbstractDecryptVerifyTask::fromDecryptVerifyResult(const GpgME::Error &err, const QString &details, const AuditLogEntry &auditLog)
	{
	return std::shared_ptr<DecryptVerifyResult>(new DecryptVerifyResult(DecryptVerify, //
	VerificationResult(),
	DecryptionResult(err),
	QByteArray(),
	{},
	err,
	details,
	inputLabel(),
	outputLabel(),
	auditLog,
	this,
	informativeSender()));
	}

	std::shared_ptr<DecryptVerifyResult>
	AbstractDecryptVerifyTask::fromVerifyOpaqueResult(const VerificationResult &vr, const QByteArray &plaintext, const AuditLogEntry &auditLog)
	{
	return std::shared_ptr<DecryptVerifyResult>(new DecryptVerifyResult(Verify, //
	vr,
	DecryptionResult(),
	plaintext,
	{},
	{},
	QString(),
	inputLabel(),
	outputLabel(),
	auditLog,
	this,
	informativeSender()));
	}
	std::shared_ptr<DecryptVerifyResult>
	AbstractDecryptVerifyTask::fromVerifyOpaqueResult(const GpgME::Error &err, const QString &details, const AuditLogEntry &auditLog)
	{
	return std::shared_ptr<DecryptVerifyResult>(new DecryptVerifyResult(Verify, //
	VerificationResult(err),
	DecryptionResult(),
	QByteArray(),
	{},
	err,
	details,
	inputLabel(),
	outputLabel(),
	auditLog,
	this,
	informativeSender()));
	}

	std::shared_ptr<DecryptVerifyResult> AbstractDecryptVerifyTask::fromVerifyDetachedResult(const VerificationResult &vr, const AuditLogEntry &auditLog)
	{
	return std::shared_ptr<DecryptVerifyResult>(new DecryptVerifyResult(Verify, //
	vr,
	DecryptionResult(),
	QByteArray(),
	{},
	{},
	QString(),
	inputLabel(),
	outputLabel(),
	auditLog,
	this,
	informativeSender()));
	}
	std::shared_ptr<DecryptVerifyResult>
	AbstractDecryptVerifyTask::fromVerifyDetachedResult(const GpgME::Error &err, const QString &details, const AuditLogEntry &auditLog)
	{
	return std::shared_ptr<DecryptVerifyResult>(new DecryptVerifyResult(Verify, //
	VerificationResult(err),
	DecryptionResult(),
	QByteArray(),
	{},
	err,
	details,
	inputLabel(),
	outputLabel(),
	auditLog,
	this,
	informativeSender()));
	}

	DecryptVerifyResult::DecryptVerifyResult(DecryptVerifyOperation type,
	const VerificationResult &vr,
	const DecryptionResult &dr,
	const QByteArray &stuff,
	const QString &fileName,
	const GpgME::Error &error,
	const QString &errString,
	const QString &inputLabel,
	const QString &outputLabel,
	const AuditLogEntry &auditLog,
	Task *parentTask,
	const Mailbox &informativeSender)
	: Task::Result()
	, d(new Private(type, vr, dr, stuff, fileName, error, errString, inputLabel, outputLabel, auditLog, parentTask, informativeSender, this))
	{
	}

	Task::Result::ContentType DecryptVerifyResult::viewableContentType() const
	{
	#if QGPGME_SUPPORTS_IS_MIME
	if (decryptionResult().isMime()) {
	return Task::Result::ContentType::Mime;
	}
	#endif

	if (fileName().endsWith(QStringLiteral("openpgp-encrypted-message"))) {
	return Task::Result::ContentType::Mime;
	}

	QMimeDatabase mimeDatabase;
	const auto mimeType = mimeDatabase.mimeTypeForFile(fileName());
	if (mimeTypeInherits(mimeType, QStringLiteral("message/rfc822"))) {
	return Task::Result::ContentType::Mime;
	}

	if (mimeTypeInherits(mimeType, QStringLiteral("application/mbox"))) {
	return Task::Result::ContentType::Mbox;
	}

	return Task::Result::ContentType::None;
	}

	QString DecryptVerifyResult::overview() const
	{
	QString ov;
	if (d->isDecryptOnly()) {
	ov += formatDecryptionResultOverview(d->m_decryptionResult);
	} else if (d->isVerifyOnly()) {
	ov += formatVerificationResultOverview(d->m_verificationResult, d->makeSenderInfo());
	} else {
	ov += formatDecryptVerifyResultOverview(d->m_decryptionResult, d->m_verificationResult, d->makeSenderInfo());
	}
	if (ov.size() + d->label().size() > 120) {
	// Avoid ugly breaks
	ov = QStringLiteral("<br>") + ov;
	}
	return i18nc("label: result example: foo.sig: Verification failed. ", "%1: %2", d->label(), ov);
	}

	QString DecryptVerifyResult::details() const
	{
	if (d->isDecryptOnly()) {
	return formatDecryptionResultDetails(d->m_decryptionResult,
	KeyCache::instance()->findRecipients(d->m_decryptionResult),
	errorString(),
	false,
	d->m_parentTask);
	}
	if (d->isVerifyOnly()) {
	return formatVerificationResultDetails(d->m_verificationResult, d->makeSenderInfo(), errorString());
	}
	return formatDecryptVerifyResultDetails(d->m_decryptionResult,
	d->m_verificationResult,
	KeyCache::instance()->findRecipients(d->m_decryptionResult),
	d->makeSenderInfo(),
	errorString(),
	d->m_parentTask);
	}

	GpgME::Error DecryptVerifyResult::error() const
	{
	return d->m_error;
	}

	QString DecryptVerifyResult::errorString() const
	{
	return d->m_errorString;
	}

	AuditLogEntry DecryptVerifyResult::auditLog() const
	{
	return d->m_auditLog;
	}

	QPointer<Task> DecryptVerifyResult::parentTask() const
	{
	return d->m_parentTask;
	}

	Task::Result::VisualCode DecryptVerifyResult::code() const
	{
	if ((d->m_type == DecryptVerify \|\| d->m_type == Verify) && relevantInDecryptVerifyContext(verificationResult())) {
	return codeForVerificationResult(verificationResult());
	}
	return hasError() ? NeutralError : NeutralSuccess;
	}

	GpgME::VerificationResult DecryptVerifyResult::verificationResult() const
	{
	return d->m_verificationResult;
	}

	GpgME::DecryptionResult DecryptVerifyResult::decryptionResult() const
	{
	return d->m_decryptionResult;
	}

	QString DecryptVerifyResult::fileName() const
	{
	return d->m_fileName;
	}

	class AbstractDecryptVerifyTask::Private
	{
	public:
	Mailbox informativeSender;
	QPointer<QGpgME::Job> job;
	};

	AbstractDecryptVerifyTask::AbstractDecryptVerifyTask(QObject *parent)
	: Task(parent)
	, d(new Private)
	{
	}

	AbstractDecryptVerifyTask::~AbstractDecryptVerifyTask()
	{
	}

	void AbstractDecryptVerifyTask::cancel()
	{
	qCDebug(KLEOPATRA_LOG) << this << __func__;
	if (d->job) {
	d->job->slotCancel();
	}
	}

	Mailbox AbstractDecryptVerifyTask::informativeSender() const
	{
	return d->informativeSender;
	}

	void AbstractDecryptVerifyTask::setInformativeSender(const Mailbox &sender)
	{
	d->informativeSender = sender;
	}

	QGpgME::Job *AbstractDecryptVerifyTask::job() const
	{
	return d->job;
	}

	void AbstractDecryptVerifyTask::setJob(QGpgME::Job *job)
	{
	d->job = job;
	}

	class DecryptVerifyTask::Private
	{
	DecryptVerifyTask *const q;

	public:
	explicit Private(DecryptVerifyTask *qq)
	: q{qq}
	{
	}

	void startDecryptVerifyJob();
	void startDecryptVerifyArchiveJob();

	void slotResult(const DecryptionResult &, const VerificationResult &, const QByteArray & = {});

	std::shared_ptr<Input> m_input;
	std::shared_ptr<Output> m_output;
	const QGpgME::Protocol *m_backend = nullptr;
	Protocol m_protocol = UnknownProtocol;
	bool m_ignoreMDCError = false;
	bool m_extractArchive = false;
	QString m_inputFilePath;
	QString m_outputFilePath;
	QString m_outputDirectory;
	};

	void DecryptVerifyTask::Private::slotResult(const DecryptionResult &dr, const VerificationResult &vr, const QByteArray &plainText)
	{
	updateKeys(vr);
	{
	std::stringstream ss;
	ss << dr << '\n' << vr;
	qCDebug(KLEOPATRA_LOG) << ss.str().c_str();
	}
	const AuditLogEntry auditLog = auditLogFromSender(q->sender());
	if (m_output) {
	if (dr.error().code() \|\| vr.error().code()) {
	m_output->cancel();
	} else {
	try {
	kleo_assert(!dr.isNull() \|\| !vr.isNull());
	m_output->finalize();
	} catch (const GpgME::Exception &e) {
	q->emitResult(q->fromDecryptResult(e.error(), QString::fromLocal8Bit(e.what()), auditLog));
	return;
	} catch (const std::exception &e) {
	q->emitResult(
	q->fromDecryptResult(Error::fromCode(GPG_ERR_INTERNAL), i18n("Caught exception: %1", QString::fromLocal8Bit(e.what())), auditLog));
	return;
	} catch (...) {
	q->emitResult(q->fromDecryptResult(Error::fromCode(GPG_ERR_INTERNAL), i18n("Caught unknown exception"), auditLog));
	return;
	}
	}
	}
	const int drErr = dr.error().code();
	const QString errorString = m_output ? m_output->errorString() : QString{};
	if (((drErr == GPG_ERR_EIO \|\| drErr == GPG_ERR_NO_DATA) && !errorString.isEmpty()) \|\| (m_output && m_output->failed())) {
	q->emitResult(q->fromDecryptResult(drErr ? dr.error() : Error::fromCode(GPG_ERR_EIO), errorString, auditLog));
	return;
	}

	q->emitResult(q->fromDecryptVerifyResult(dr, vr, plainText, m_output ? m_output->fileName() : m_outputFilePath, auditLog));
	}

	DecryptVerifyTask::DecryptVerifyTask(QObject *parent)
	: AbstractDecryptVerifyTask(parent)
	, d(new Private(this))
	{
	}

	DecryptVerifyTask::~DecryptVerifyTask()
	{
	}

	void DecryptVerifyTask::setInput(const std::shared_ptr<Input> &input)
	{
	d->m_input = input;
	kleo_assert(d->m_input && d->m_input->ioDevice());
	}

	void DecryptVerifyTask::setOutput(const std::shared_ptr<Output> &output)
	{
	d->m_output = output;
	kleo_assert(d->m_output && d->m_output->ioDevice());
	}

	void DecryptVerifyTask::setProtocol(Protocol prot)
	{
	kleo_assert(prot != UnknownProtocol);
	d->m_protocol = prot;
	d->m_backend = prot == GpgME::OpenPGP ? QGpgME::openpgp() : QGpgME::smime();
	kleo_assert(d->m_backend);
	}

	void DecryptVerifyTask::autodetectProtocolFromInput()
	{
	if (!d->m_input) {
	return;
	}
	const Protocol p = findProtocol(d->m_input->classification());
	if (p == UnknownProtocol) {
	throw Exception(
	gpg_error(GPG_ERR_NOTHING_FOUND),
	i18n("Could not determine whether this is an S/MIME or an OpenPGP signature/ciphertext - maybe it is neither ciphertext nor a signature?"),
	Exception::MessageOnly);
	}
	setProtocol(p);
	}

	QString DecryptVerifyTask::label() const
	{
	return i18n("Decrypting %1...", inputLabel());
	}

	unsigned long long DecryptVerifyTask::inputSize() const
	{
	return d->m_input ? d->m_input->size() : 0;
	}

	QString DecryptVerifyTask::inputLabel() const
	{
	return d->m_input ? d->m_input->label() : QFileInfo{d->m_inputFilePath}.fileName();
	}

	QString DecryptVerifyTask::outputLabel() const
	{
	if (d->m_output) {
	return d->m_output->label();
	} else if (!d->m_outputFilePath.isEmpty()) {
	return QFileInfo{d->m_outputFilePath}.fileName();
	} else {
	return d->m_outputDirectory;
	}
	}

	Protocol DecryptVerifyTask::protocol() const
	{
	return d->m_protocol;
	}

	static void ensureIOOpen(QIODevice input, QIODevice output)
	{
	if (input && !input->isOpen()) {
	input->open(QIODevice::ReadOnly);
	}
	if (output && !output->isOpen()) {
	output->open(QIODevice::WriteOnly);
	}
	}

	void DecryptVerifyTask::setIgnoreMDCError(bool value)
	{
	d->m_ignoreMDCError = value;
	}

	void DecryptVerifyTask::setExtractArchive(bool extract)
	{
	d->m_extractArchive = extract;
	}

	void DecryptVerifyTask::setInputFile(const QString &path)
	{
	d->m_inputFilePath = path;
	}

	void DecryptVerifyTask::setOutputFile(const QString &path)
	{
	d->m_outputFilePath = path;
	}

	void DecryptVerifyTask::setOutputDirectory(const QString &directory)
	{
	d->m_outputDirectory = directory;
	}

	static bool archiveJobsCanBeUsed(GpgME::Protocol protocol)
	{
	return (protocol == GpgME::OpenPGP) && QGpgME::DecryptVerifyArchiveJob::isSupported();
	}

	void DecryptVerifyTask::doStart()
	{
	kleo_assert(d->m_backend);
	if (d->m_extractArchive && archiveJobsCanBeUsed(d->m_protocol)) {
	d->startDecryptVerifyArchiveJob();
	} else {
	d->startDecryptVerifyJob();
	}
	}

	static void setIgnoreMDCErrorFlag(QGpgME::Job *job, bool ignoreMDCError)
	{
	if (ignoreMDCError) {
	qCDebug(KLEOPATRA_LOG) << "Modifying job to ignore MDC errors.";
	auto ctx = QGpgME::Job::context(job);
	if (!ctx) {
	qCWarning(KLEOPATRA_LOG) << "Failed to get context for job";
	} else {
	const auto err = ctx->setFlag("ignore-mdc-error", "1");
	if (err) {
	qCWarning(KLEOPATRA_LOG) << "Failed to set ignore mdc errors" << Formatting::errorAsString(err);
	}
	}
	}
	}

	void DecryptVerifyTask::Private::startDecryptVerifyJob()
	{
	#if QGPGME_FILE_JOBS_SUPPORT_DIRECT_FILE_IO
	if (!m_outputFilePath.isEmpty() && QFile::exists(m_outputFilePath)) {
	// The output files are always written to a temporary location. Therefore, this can only occur
	// if two signed/encrypted files with the same name in different folders are verified/decrypted
	// because they would be written to the same temporary location.
	QMetaObject::invokeMethod(
	q,
	[this]() {
	slotResult(DecryptionResult{Error::fromCode(GPG_ERR_EEXIST)}, VerificationResult{});
	},
	Qt::QueuedConnection);
	return;
	}
	#endif
	try {
	std::unique_ptr<QGpgME::DecryptVerifyJob> job{m_backend->decryptVerifyJob()};
	kleo_assert(job);
	setIgnoreMDCErrorFlag(job.get(), m_ignoreMDCError);
	QObject::connect(job.get(),
	&QGpgME::DecryptVerifyJob::result,
	q,
	[this](const GpgME::DecryptionResult &decryptResult, const GpgME::VerificationResult &verifyResult, const QByteArray &plainText) {
	slotResult(decryptResult, verifyResult, plainText);
	});
	connect(job.get(), &QGpgME::Job::jobProgress, q, &DecryptVerifyTask::setProgress);
	#if QGPGME_SUPPORTS_PROCESS_ALL_SIGNATURES
	job->setProcessAllSignatures(true);
	#endif
	#if QGPGME_FILE_JOBS_SUPPORT_DIRECT_FILE_IO
	if (!m_inputFilePath.isEmpty() && !m_outputFilePath.isEmpty()) {
	job->setInputFile(m_inputFilePath);
	job->setOutputFile(m_outputFilePath);
	const auto err = job->startIt();
	} else {
	ensureIOOpen(m_input->ioDevice().get(), m_output->ioDevice().get());
	job->start(m_input->ioDevice(), m_output->ioDevice());
	}
	#else
	ensureIOOpen(m_input->ioDevice().get(), m_output->ioDevice().get());
	job->start(m_input->ioDevice(), m_output->ioDevice());
	#endif
	q->setJob(job.release());
	} catch (const GpgME::Exception &e) {
	q->emitResult(q->fromDecryptVerifyResult(e.error(), QString::fromLocal8Bit(e.what()), AuditLogEntry()));
	} catch (const std::exception &e) {
	q->emitResult(
	q->fromDecryptVerifyResult(Error::fromCode(GPG_ERR_INTERNAL), i18n("Caught exception: %1", QString::fromLocal8Bit(e.what())), AuditLogEntry()));
	} catch (...) {
	q->emitResult(q->fromDecryptVerifyResult(Error::fromCode(GPG_ERR_INTERNAL), i18n("Caught unknown exception"), AuditLogEntry()));
	}
	}

	void DecryptVerifyTask::Private::startDecryptVerifyArchiveJob()
	{
	std::unique_ptr<QGpgME::DecryptVerifyArchiveJob> job{m_backend->decryptVerifyArchiveJob()};
	kleo_assert(job);
	setIgnoreMDCErrorFlag(job.get(), m_ignoreMDCError);
	connect(job.get(),
	&QGpgME::DecryptVerifyArchiveJob::result,
	q,
	[this](const GpgME::DecryptionResult &decryptResult, const GpgME::VerificationResult &verifyResult) {
	slotResult(decryptResult, verifyResult);
	});
	connect(job.get(), &QGpgME::Job::jobProgress, q, &DecryptVerifyTask::setProgress);
	// make sure that we don't use an existing output directory
	const auto outputDirectory = ensureUniqueDirectory(m_outputDirectory);
	if (outputDirectory.isEmpty()) {
	q->emitResult(q->fromDecryptVerifyResult(Error::fromCode(GPG_ERR_GENERAL), {}, {}));
	return;
	}
	m_outputDirectory = outputDirectory;
	#if QGPGME_SUPPORTS_PROCESS_ALL_SIGNATURES
	job->setProcessAllSignatures(true);
	#endif
	job->setInputFile(m_inputFilePath);
	job->setOutputDirectory(m_outputDirectory);
	const auto err = job->startIt();
	q->setJob(job.release());
	if (err) {
	q->emitResult(q->fromDecryptVerifyResult(err, {}, {}));
	}
	}

	class DecryptTask::Private
	{
	DecryptTask *const q;

	public:
	explicit Private(DecryptTask *qq)
	: q{qq}
	{
	}

	void slotResult(const DecryptionResult &, const QByteArray &);

	void registerJob(QGpgME::DecryptJob *job)
	{
	q->connect(job, SIGNAL(result(GpgME::DecryptionResult, QByteArray)), q, SLOT(slotResult(GpgME::DecryptionResult, QByteArray)));
	q->connect(job, &QGpgME::Job::jobProgress, q, &DecryptTask::setProgress);
	}

	std::shared_ptr<Input> m_input;
	std::shared_ptr<Output> m_output;
	const QGpgME::Protocol *m_backend = nullptr;
	Protocol m_protocol = UnknownProtocol;
	};

	void DecryptTask::Private::slotResult(const DecryptionResult &result, const QByteArray &plainText)
	{
	{
	std::stringstream ss;
	ss << result;
	qCDebug(KLEOPATRA_LOG) << ss.str().c_str();
	}
	const AuditLogEntry auditLog = auditLogFromSender(q->sender());
	if (result.error().code()) {
	m_output->cancel();
	} else {
	try {
	kleo_assert(!result.isNull());
	m_output->finalize();
	} catch (const GpgME::Exception &e) {
	q->emitResult(q->fromDecryptResult(e.error(), QString::fromLocal8Bit(e.what()), auditLog));
	return;
	} catch (const std::exception &e) {
	q->emitResult(q->fromDecryptResult(Error::fromCode(GPG_ERR_INTERNAL), i18n("Caught exception: %1", QString::fromLocal8Bit(e.what())), auditLog));
	return;
	} catch (...) {
	q->emitResult(q->fromDecryptResult(Error::fromCode(GPG_ERR_INTERNAL), i18n("Caught unknown exception"), auditLog));
	return;
	}
	}

	const int drErr = result.error().code();
	const QString errorString = m_output->errorString();
	if (((drErr == GPG_ERR_EIO \|\| drErr == GPG_ERR_NO_DATA) && !errorString.isEmpty()) \|\| m_output->failed()) {
	q->emitResult(q->fromDecryptResult(result.error() ? result.error() : Error::fromCode(GPG_ERR_EIO), errorString, auditLog));
	return;
	}

	q->emitResult(q->fromDecryptResult(result, plainText, auditLog));
	}

	DecryptTask::DecryptTask(QObject *parent)
	: AbstractDecryptVerifyTask(parent)
	, d(new Private(this))
	{
	}

	DecryptTask::~DecryptTask()
	{
	}

	void DecryptTask::setInput(const std::shared_ptr<Input> &input)
	{
	d->m_input = input;
	kleo_assert(d->m_input && d->m_input->ioDevice());
	}

	void DecryptTask::setOutput(const std::shared_ptr<Output> &output)
	{
	d->m_output = output;
	kleo_assert(d->m_output && d->m_output->ioDevice());
	}

	void DecryptTask::setProtocol(Protocol prot)
	{
	kleo_assert(prot != UnknownProtocol);
	d->m_protocol = prot;
	d->m_backend = (prot == GpgME::OpenPGP) ? QGpgME::openpgp() : QGpgME::smime();
	kleo_assert(d->m_backend);
	}

	void DecryptTask::autodetectProtocolFromInput()
	{
	if (!d->m_input) {
	return;
	}
	const Protocol p = findProtocol(d->m_input->classification());
	if (p == UnknownProtocol) {
	throw Exception(gpg_error(GPG_ERR_NOTHING_FOUND),
	i18n("Could not determine whether this was S/MIME- or OpenPGP-encrypted - maybe it is not ciphertext at all?"),
	Exception::MessageOnly);
	}
	setProtocol(p);
	}

	QString DecryptTask::label() const
	{
	return i18n("Decrypting: %1...", d->m_input->label());
	}

	unsigned long long DecryptTask::inputSize() const
	{
	return d->m_input ? d->m_input->size() : 0;
	}

	QString DecryptTask::inputLabel() const
	{
	return d->m_input ? d->m_input->label() : QString();
	}

	QString DecryptTask::outputLabel() const
	{
	return d->m_output ? d->m_output->label() : QString();
	}

	Protocol DecryptTask::protocol() const
	{
	return d->m_protocol;
	}

	void DecryptTask::doStart()
	{
	kleo_assert(d->m_backend);

	try {
	std::unique_ptr<QGpgME::DecryptJob> job{d->m_backend->decryptJob()};
	kleo_assert(job);
	d->registerJob(job.get());
	ensureIOOpen(d->m_input->ioDevice().get(), d->m_output->ioDevice().get());
	job->start(d->m_input->ioDevice(), d->m_output->ioDevice());
	setJob(job.release());
	} catch (const GpgME::Exception &e) {
	emitResult(fromDecryptResult(e.error(), QString::fromLocal8Bit(e.what()), AuditLogEntry()));
	} catch (const std::exception &e) {
	emitResult(fromDecryptResult(Error::fromCode(GPG_ERR_INTERNAL), i18n("Caught exception: %1", QString::fromLocal8Bit(e.what())), AuditLogEntry()));
	} catch (...) {
	emitResult(fromDecryptResult(Error::fromCode(GPG_ERR_INTERNAL), i18n("Caught unknown exception"), AuditLogEntry()));
	}
	}

	class VerifyOpaqueTask::Private
	{
	VerifyOpaqueTask *const q;

	public:
	explicit Private(VerifyOpaqueTask *qq)
	: q{qq}
	{
	}

	void startVerifyOpaqueJob();
	void startDecryptVerifyArchiveJob();

	void slotResult(const VerificationResult &, const QByteArray & = {});

	std::shared_ptr<Input> m_input;
	std::shared_ptr<Output> m_output;
	const QGpgME::Protocol *m_backend = nullptr;
	Protocol m_protocol = UnknownProtocol;
	bool m_extractArchive = false;
	QString m_inputFilePath;
	QString m_outputFilePath;
	QString m_outputDirectory;
	};

	void VerifyOpaqueTask::Private::slotResult(const VerificationResult &result, const QByteArray &plainText)
	{
	updateKeys(result);
	{
	std::stringstream ss;
	ss << result;
	qCDebug(KLEOPATRA_LOG) << ss.str().c_str();
	}
	const AuditLogEntry auditLog = auditLogFromSender(q->sender());
	if (m_output) {
	if (result.error().code()) {
	m_output->cancel();
	} else {
	try {
	kleo_assert(!result.isNull());
	m_output->finalize();
	} catch (const GpgME::Exception &e) {
	q->emitResult(q->fromVerifyOpaqueResult(e.error(), QString::fromLocal8Bit(e.what()), auditLog));
	return;
	} catch (const std::exception &e) {
	q->emitResult(
	q->fromVerifyOpaqueResult(Error::fromCode(GPG_ERR_INTERNAL), i18n("Caught exception: %1", QString::fromLocal8Bit(e.what())), auditLog));
	return;
	} catch (...) {
	q->emitResult(q->fromVerifyOpaqueResult(Error::fromCode(GPG_ERR_INTERNAL), i18n("Caught unknown exception"), auditLog));
	return;
	}
	}
	}

	const int drErr = result.error().code();
	const QString errorString = m_output ? m_output->errorString() : QString{};
	if (((drErr == GPG_ERR_EIO \|\| drErr == GPG_ERR_NO_DATA) && !errorString.isEmpty()) \|\| (m_output && m_output->failed())) {
	q->emitResult(q->fromVerifyOpaqueResult(result.error() ? result.error() : Error::fromCode(GPG_ERR_EIO), errorString, auditLog));
	return;
	}

	q->emitResult(q->fromVerifyOpaqueResult(result, plainText, auditLog));
	}

	VerifyOpaqueTask::VerifyOpaqueTask(QObject *parent)
	: AbstractDecryptVerifyTask(parent)
	, d(new Private(this))
	{
	}

	VerifyOpaqueTask::~VerifyOpaqueTask()
	{
	}

	void VerifyOpaqueTask::setInput(const std::shared_ptr<Input> &input)
	{
	d->m_input = input;
	kleo_assert(d->m_input && d->m_input->ioDevice());
	}

	void VerifyOpaqueTask::setOutput(const std::shared_ptr<Output> &output)
	{
	d->m_output = output;
	kleo_assert(d->m_output && d->m_output->ioDevice());
	}

	void VerifyOpaqueTask::setProtocol(Protocol prot)
	{
	kleo_assert(prot != UnknownProtocol);
	d->m_protocol = prot;
	d->m_backend = (prot == GpgME::OpenPGP) ? QGpgME::openpgp() : QGpgME::smime();
	kleo_assert(d->m_backend);
	}

	void VerifyOpaqueTask::autodetectProtocolFromInput()
	{
	if (!d->m_input) {
	return;
	}
	const Protocol p = findProtocol(d->m_input->classification());
	if (p == UnknownProtocol) {
	throw Exception(gpg_error(GPG_ERR_NOTHING_FOUND),
	i18n("Could not determine whether this is an S/MIME or an OpenPGP signature - maybe it is not a signature at all?"),
	Exception::MessageOnly);
	}
	setProtocol(p);
	}

	QString VerifyOpaqueTask::label() const
	{
	return i18n("Verifying %1...", inputLabel());
	}

	unsigned long long VerifyOpaqueTask::inputSize() const
	{
	return d->m_input ? d->m_input->size() : 0;
	}

	QString VerifyOpaqueTask::inputLabel() const
	{
	return d->m_input ? d->m_input->label() : QFileInfo{d->m_inputFilePath}.fileName();
	}

	QString VerifyOpaqueTask::outputLabel() const
	{
	if (d->m_output) {
	return d->m_output->label();
	} else if (!d->m_outputFilePath.isEmpty()) {
	return QFileInfo{d->m_outputFilePath}.fileName();
	} else {
	return d->m_outputDirectory;
	}
	}

	Protocol VerifyOpaqueTask::protocol() const
	{
	return d->m_protocol;
	}

	void VerifyOpaqueTask::setExtractArchive(bool extract)
	{
	d->m_extractArchive = extract;
	}

	void VerifyOpaqueTask::setInputFile(const QString &path)
	{
	d->m_inputFilePath = path;
	}

	void VerifyOpaqueTask::setOutputFile(const QString &path)
	{
	d->m_outputFilePath = path;
	}

	void VerifyOpaqueTask::setOutputDirectory(const QString &directory)
	{
	d->m_outputDirectory = directory;
	}

	void VerifyOpaqueTask::doStart()
	{
	kleo_assert(d->m_backend);
	if (d->m_extractArchive && archiveJobsCanBeUsed(d->m_protocol)) {
	d->startDecryptVerifyArchiveJob();
	} else {
	d->startVerifyOpaqueJob();
	}
	}

	void VerifyOpaqueTask::Private::startVerifyOpaqueJob()
	{
	#if QGPGME_FILE_JOBS_SUPPORT_DIRECT_FILE_IO
	if (!m_outputFilePath.isEmpty() && QFile::exists(m_outputFilePath)) {
	// The output files are always written to a temporary location. Therefore, this can only occur
	// if two signed/encrypted files with the same name in different folders are verified/decrypted
	// because they would be written to the same temporary location.
	QMetaObject::invokeMethod(
	q,
	[this]() {
	slotResult(VerificationResult{Error::fromCode(GPG_ERR_EEXIST)});
	},
	Qt::QueuedConnection);
	return;
	}
	#endif
	try {
	std::unique_ptr<QGpgME::VerifyOpaqueJob> job{m_backend->verifyOpaqueJob()};
	kleo_assert(job);
	connect(job.get(), &QGpgME::VerifyOpaqueJob::result, q, [this](const GpgME::VerificationResult &result, const QByteArray &plainText) {
	slotResult(result, plainText);
	});
	connect(job.get(), &QGpgME::Job::jobProgress, q, &VerifyOpaqueTask::setProgress);
	#if QGPGME_SUPPORTS_PROCESS_ALL_SIGNATURES
	job->setProcessAllSignatures(true);
	#endif
	#if QGPGME_FILE_JOBS_SUPPORT_DIRECT_FILE_IO
	if (!m_inputFilePath.isEmpty() && !m_outputFilePath.isEmpty()) {
	job->setInputFile(m_inputFilePath);
	job->setOutputFile(m_outputFilePath);
	const auto err = job->startIt();
	} else {
	ensureIOOpen(m_input->ioDevice().get(), m_output ? m_output->ioDevice().get() : nullptr);
	job->start(m_input->ioDevice(), m_output ? m_output->ioDevice() : std::shared_ptr<QIODevice>());
	}
	#else
	ensureIOOpen(m_input->ioDevice().get(), m_output ? m_output->ioDevice().get() : nullptr);
	job->start(m_input->ioDevice(), m_output ? m_output->ioDevice() : std::shared_ptr<QIODevice>());
	#endif
	q->setJob(job.release());
	} catch (const GpgME::Exception &e) {
	q->emitResult(q->fromVerifyOpaqueResult(e.error(), QString::fromLocal8Bit(e.what()), AuditLogEntry()));
	} catch (const std::exception &e) {
	q->emitResult(
	q->fromVerifyOpaqueResult(Error::fromCode(GPG_ERR_INTERNAL), i18n("Caught exception: %1", QString::fromLocal8Bit(e.what())), AuditLogEntry()));
	} catch (...) {
	q->emitResult(q->fromVerifyOpaqueResult(Error::fromCode(GPG_ERR_INTERNAL), i18n("Caught unknown exception"), AuditLogEntry()));
	}
	}

	void VerifyOpaqueTask::Private::startDecryptVerifyArchiveJob()
	{
	std::unique_ptr<QGpgME::DecryptVerifyArchiveJob> job{m_backend->decryptVerifyArchiveJob()};
	kleo_assert(job);
	connect(job.get(), &QGpgME::DecryptVerifyArchiveJob::result, q, [this](const DecryptionResult &, const VerificationResult &verifyResult) {
	slotResult(verifyResult);
	});
	connect(job.get(), &QGpgME::DecryptVerifyArchiveJob::dataProgress, q, &VerifyOpaqueTask::setProgress);
	// make sure that we don't use an existing output directory
	const auto outputDirectory = ensureUniqueDirectory(m_outputDirectory);
	if (outputDirectory.isEmpty()) {
	q->emitResult(q->fromDecryptVerifyResult(Error::fromCode(GPG_ERR_GENERAL), {}, {}));
	return;
	}
	m_outputDirectory = outputDirectory;
	#if QGPGME_SUPPORTS_PROCESS_ALL_SIGNATURES
	job->setProcessAllSignatures(true);
	#endif
	job->setInputFile(m_inputFilePath);
	job->setOutputDirectory(m_outputDirectory);
	const auto err = job->startIt();
	q->setJob(job.release());
	if (err) {
	q->emitResult(q->fromVerifyOpaqueResult(err, {}, {}));
	}
	}

	class VerifyDetachedTask::Private
	{
	VerifyDetachedTask *const q;

	public:
	explicit Private(VerifyDetachedTask *qq)
	: q{qq}
	{
	}

	void slotResult(const VerificationResult &);

	void registerJob(QGpgME::VerifyDetachedJob *job)
	{
	q->connect(job, SIGNAL(result(GpgME::VerificationResult)), q, SLOT(slotResult(GpgME::VerificationResult)));
	q->connect(job, &QGpgME::Job::jobProgress, q, &VerifyDetachedTask::setProgress);
	}

	QString signatureLabel() const;
	QString signedDataLabel() const;

	std::shared_ptr<Input> m_input, m_signedData;
	const QGpgME::Protocol *m_backend = nullptr;
	Protocol m_protocol = UnknownProtocol;
	QString m_signatureFilePath;
	QString m_signedFilePath;
	};

	void VerifyDetachedTask::Private::slotResult(const VerificationResult &result)
	{
	updateKeys(result);
	{
	std::stringstream ss;
	ss << result;
	qCDebug(KLEOPATRA_LOG) << ss.str().c_str();
	}
	const AuditLogEntry auditLog = auditLogFromSender(q->sender());
	try {
	kleo_assert(!result.isNull());
	q->emitResult(q->fromVerifyDetachedResult(result, auditLog));
	} catch (const GpgME::Exception &e) {
	q->emitResult(q->fromVerifyDetachedResult(e.error(), QString::fromLocal8Bit(e.what()), auditLog));
	} catch (const std::exception &e) {
	q->emitResult(q->fromVerifyDetachedResult(Error::fromCode(GPG_ERR_INTERNAL), i18n("Caught exception: %1", QString::fromLocal8Bit(e.what())), auditLog));
	} catch (...) {
	q->emitResult(q->fromVerifyDetachedResult(Error::fromCode(GPG_ERR_INTERNAL), i18n("Caught unknown exception"), auditLog));
	}
	}

	QString VerifyDetachedTask::Private::signatureLabel() const
	{
	return m_input ? m_input->label() : m_signatureFilePath;
	}

	QString VerifyDetachedTask::Private::signedDataLabel() const
	{
	return m_signedData ? m_signedData->label() : m_signedFilePath;
	}

	VerifyDetachedTask::VerifyDetachedTask(QObject *parent)
	: AbstractDecryptVerifyTask(parent)
	, d(new Private(this))
	{
	}

	VerifyDetachedTask::~VerifyDetachedTask()
	{
	}

	void VerifyDetachedTask::setInput(const std::shared_ptr<Input> &input)
	{
	d->m_input = input;
	kleo_assert(d->m_input && d->m_input->ioDevice());
	}

	void VerifyDetachedTask::setSignedData(const std::shared_ptr<Input> &signedData)
	{
	d->m_signedData = signedData;
	kleo_assert(d->m_signedData && d->m_signedData->ioDevice());
	}

	void VerifyDetachedTask::setSignatureFile(const QString &path)
	{
	d->m_signatureFilePath = path;
	}

	void VerifyDetachedTask::setSignedFile(const QString &path)
	{
	d->m_signedFilePath = path;
	}

	void VerifyDetachedTask::setProtocol(Protocol prot)
	{
	kleo_assert(prot != UnknownProtocol);
	d->m_protocol = prot;
	d->m_backend = (prot == GpgME::OpenPGP) ? QGpgME::openpgp() : QGpgME::smime();
	kleo_assert(d->m_backend);
	}

	void VerifyDetachedTask::autodetectProtocolFromInput()
	{
	if (!d->m_input) {
	return;
	}
	const Protocol p = findProtocol(d->m_input->classification());
	if (p == UnknownProtocol) {
	throw Exception(gpg_error(GPG_ERR_NOTHING_FOUND),
	i18n("Could not determine whether this is an S/MIME or an OpenPGP signature - maybe it is not a signature at all?"),
	Exception::MessageOnly);
	}
	setProtocol(p);
	}

	unsigned long long VerifyDetachedTask::inputSize() const
	{
	return d->m_signedData ? d->m_signedData->size() : 0;
	}

	QString VerifyDetachedTask::label() const
	{
	const QString signedDataLabel = d->signedDataLabel();
	if (!signedDataLabel.isEmpty()) {
	return xi18nc(
	"Verification of a detached signature in progress. The first file contains the data."
	"The second file is the signature file.",
	"Verifying <filename>%1</filename> with <filename>%2</filename>...",
	signedDataLabel,
	d->signatureLabel());
	}
	return i18n("Verifying signature %1...", d->signatureLabel());
	}

	QString VerifyDetachedTask::inputLabel() const
	{
	const QString signatureLabel = d->signatureLabel();
	const QString signedDataLabel = d->signedDataLabel();
	if (!signedDataLabel.isEmpty() && !signatureLabel.isEmpty()) {
	return xi18nc(
	"Verification of a detached signature summary. The first file contains the data."
	"The second file is signature.",
	"Verified <filename>%1</filename> with <filename>%2</filename>",
	signedDataLabel,
	signatureLabel);
	}
	return signatureLabel;
	}

	QString VerifyDetachedTask::outputLabel() const
	{
	return QString();
	}

	Protocol VerifyDetachedTask::protocol() const
	{
	return d->m_protocol;
	}

	void VerifyDetachedTask::doStart()
	{
	kleo_assert(d->m_backend);
	try {
	std::unique_ptr<QGpgME::VerifyDetachedJob> job{d->m_backend->verifyDetachedJob()};
	kleo_assert(job);
	d->registerJob(job.get());
	#if QGPGME_SUPPORTS_PROCESS_ALL_SIGNATURES
	job->setProcessAllSignatures(true);
	#endif
	#if QGPGME_FILE_JOBS_SUPPORT_DIRECT_FILE_IO
	if (d->m_protocol == GpgME::OpenPGP && !d->m_signatureFilePath.isEmpty() && !d->m_signedFilePath.isEmpty()) {
	job->setSignatureFile(d->m_signatureFilePath);
	job->setSignedFile(d->m_signedFilePath);
	job->startIt();
	} else {
	ensureIOOpen(d->m_input->ioDevice().get(), nullptr);
	ensureIOOpen(d->m_signedData->ioDevice().get(), nullptr);
	job->start(d->m_input->ioDevice(), d->m_signedData->ioDevice());
	}
	#else
	ensureIOOpen(d->m_input->ioDevice().get(), nullptr);
	ensureIOOpen(d->m_signedData->ioDevice().get(), nullptr);
	job->start(d->m_input->ioDevice(), d->m_signedData->ioDevice());
	#endif
	setJob(job.release());
	} catch (const GpgME::Exception &e) {
	emitResult(fromVerifyDetachedResult(e.error(), QString::fromLocal8Bit(e.what()), AuditLogEntry()));
	} catch (const std::exception &e) {
	emitResult(
	fromVerifyDetachedResult(Error::fromCode(GPG_ERR_INTERNAL), i18n("Caught exception: %1", QString::fromLocal8Bit(e.what())), AuditLogEntry()));
	} catch (...) {
	emitResult(fromVerifyDetachedResult(Error::fromCode(GPG_ERR_INTERNAL), i18n("Caught unknown exception"), AuditLogEntry()));
	}
	}

	#include "moc_decryptverifytask.cpp"

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